Loom



Patented Mar. 10, 1925.

UNITED STATES 1,529,206 .PATEN'YT' OFFICE.

FREDERICK JAMES NGRRIS, 0]? FALL RIVER, MASSACHUSETTS, ASSIGNOR TO BAR- NARD MANUFACTURING COMPANY, OF FALL POB-ATION OF MASSACHUSETTS.

I LOOM.

Application filed February 27, 1924. seminarians,

I! '0 all whom it may concern:

Be it known that I, FREDERICK J. NoRRIs, a citizen of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Looms, of which the following is a specification? This invention relates particularly to the intermediate mechanism which connects the lay-operating crank-shaft of a loom with the usual jumper mechanism, said intermediate mechanism being adjustable to per mit variations in the timing ofthe movements of the heddles relative to thoseof the lay.

Heretofore said intermediate mechanism has included an arm having a hub adjustably secured by a set screw or screws to the crank-shaft and connected by a connectingrod with an oscillatory element of the jumper mechanism. This intermediate mechanism is objectionable, because the arm liable to become loose on the crank-shaft.

One object of the invention is to provide an improved adjustable intermediate mechanism obviating the above-mentioned objection.

Another object is to improve the construction of the oscillatory element of the jumper mechanism in such manner as to provide an improved connection between said element and the usual hooked rods constituting elements of the connections betweenthe oscillatory element and the heddles, said rods being moved as usual in one direction by the oscillatory element, and in the opposite direction by the usual dobby levers, the improved connection obviating certain objections hereinafter stated to the connection ordinarily provided.

Of the accompanying drawings forming a part of this specification,-

Figure 1 is a side View, showing a portion of a loom embodying my improvements.

Figure 2 is a fragmentary end view, a portion of the frame being shown in section.

Figure 3 is an enlargement of a portion of Figure 1.

Figure 4 is a section on line 4-4 of Figure 3.

Figure 5 is a side view, showing separately the hub shown by F igures 3 and 4.

Figure 6 is a fragmentary perspective View, showing portions of the jumper mecha nism.

The same reference characters indicate the same parts in all of the figures.

. .12 designates the crank-shaft of a 100m connected as usual, with the lay 13, by a rod 14. The heddles 15 are operated asusual, by a jumper mechanism and a dobby mechanism. The jumper mechanism includes an oscillatory element, comprising a rock-shaft 16, having at one end an arm 17, engaged with "a connecting-rod 18, through which oscillatory .-motion is imparted to said element from the crank-shaft, and a pair of spaced apart arms 17*, arranged at an angle to'the arm 17.

cross-bar 21,'co.unec ting the arms 17*. There are as many rods 19 as there are heddles, only one rod being shown by Figure 6. Each rod is provided with Ja'slot 22, engaging a lever 23 (Figure 2) of the dobby mechanism. Each rod is connected by a flexible strap 24' with the corresponding heddle, the straps passing overpulleys 25.

The mechanism as above described, is well known, and involves nothing new with me, excepting the form of the bar 21, and the means connecting the rod 18 with the crankshaft, as hereinafter described. It is therefore unnecessary to describe the operation 'of a loom including said mechanism.

studs 30, passing through a-rcuat e slots 32 in the hub, the studs having heads 31 adapted to exert a clamping pressure on the hub.

, Said heads may be integral with the studs,

the latter being screwed into tapped orifices in the holder, or the studs may be otherwise fixed to the holder, the heads being clamping nuts engaged with threaded portions of the studs.

The hub is provided with an eccentric wrist-pin 34, preferably inserted in an eccentric boss 35, formed on the hub, the bossv having a recess receiving the head 36 of the wrist-pin, and a slot 35 through which the pin projects, as shown by Figure 4. A nut RIVERQMASSACHUSETTS, A C'OR- lhe jumper mechanism also includes rods or wires 19, having hooks 20, engaged with a 37 on the'wrist-pin confines an enlarged end vof the connecting-rod 18 on the wrist-pin. The opposite end of the rod 18 is pivoted to the arm :17 .at'3-8.

The boss 35 offsets :the wrist-pin and the connecting-rod from the body of the hub. The holder 27 is preferably provided with an annular hand grip 39, connected with the body of the holder by arms' lO, so 't'hat the crank-shaft ma bemanually rotated. It is common "toprovidea hand wheel for this purpose as 'a'sep'a-r'ate member. I have departed from the usual practice in this respectby utilizing the holder 27 constituting an element of adjustable connecting mechanism, as an elementotfa hand wheel.

The holder 27, the hub 28 rotatively mounted on the holder, and provided with the w1ist-pin'34,'t11e connecting-rod :18, and the means "for positively "confining the hub to the holder in various adjusted positions, constitute a reliable adjusting mechanism whereby the movements'of the 'j umper' m'echanism may be timed or varied with relation to those of the lay, said mechanism being free from liability to become accidentally loosened and inoperative Heretofore each of'the hooked rods 19 of the jumper mechanism has been connected with a bar extending between the rock-shaft arms 17 by aleather strapengaged at one end with the hook 20, and securedv "at the other end 'to th'e bar'by a screw. These straps are flexible and cause an uneven or jerky actionof the jumper mechanism which is objectionable Q Another objection isthe weakness "o it the straps, causing more or less breakage at the end portions, and loss of time. To obviate "these objections I elongate the rods "19, so that their hooks 20 directly engage the'bar '21, as shown by Figure 16. "The hooks are slidable on the bar, and the rods are spaced apart by peripheral corrugations or ridges 42, formed on the bar, as shown by Figure 6.

'1. An adjustable'intermediate mechanism, "adapted to connect the lay-operating crankshaft with the jumper mechanism of a loom,

. said 'mechanismcomprising a holder fixed to the crank-shaft, a hub mounted for 'rotathe holder in any position to which the hub may be "rotatively adjusted.

3. An adjustable intermediate mechanism substantially as specified'by claim 1, said holder bei'ngprovide'd with an outwardly projecting eccentric boss supporting said wrist-"pin o'flisetfirom the holder and from the body of the hub.

4. An-adjustabl'e intermediate mechanism substantially as specified by claim 1, said holder being provided with an outwardly projecting eccentric boss supporting said wrist-pin offset from the holder and from the body of the hub, the holder being provided'alsowithan annular hand grip spaced.

from fthe connecting-rod, and permitting manual rotation of the crank-shaft.

'5. A loom which includes a 'lay ope'rating c'ra'nk-shait, a 'do'bby mechanism, umper mechanism including an oscillatory element, adjustable means-connecting the crank-shaft with the elementto oscillate the latter, said means including a connecting-rod, and a plurality of hooked rods constituting elements of connections between the oscillatory element, the (IObb) I11B Cl1E1I1lS1l1, and the heddlefs, "the said el'e'i'neiit comprising a "rock- .sha r 't having an arm-engaged with theconnecting-rod, a pair of spaced apart arms 'fi'xedt'o the -rock=shaft and arranged at an angle "to the rod-engaging arm, and a bar connecting said spaced apart arms and pro- "vided with a plurality *of peripheral corrugations directly engaging the-hooks of said -hooked rods and spacing the rods apart, the hooks being slidableon the corrugated bar.

In testimony whereof I have afixed my signature.

FREDERICK JAMES NORRIS. 

